Question

Name three factors on which heat energy absorbed by a body depends and state how it depends on them.

Answer 1

Concept of heat energy and the factors on which it depends. As we know that heat is a form of energy and heat is transferred only when there is temperature difference. Also it depends on some other factors like mass, color and heat capacity of the body.

Complete step by step answer:
Heat is a form of energy which produces a sensation of hotness or coldness in our body.
- The CGS units of heat are calorie (cal) and SI units are Joule (J).
Calorie $= 4.186$joule
- Temperature is the degree of hotness or coldness of a body.
Factors on which heat energy absorbed by a body depend are:-
1. Temperature of body:- Heat flows from high temperature to low temperature. So, if the difference of temperatures between the body and the surroundings in more, then more is the heat flow. Now, if the body is at much lower temperature than the surrounding, it will absorb more heat.
2. Heat capacity of body:- It is the amount of heat required to raise the temperature of a body through one degree. It is also called thermal capacity.
Heat capacity$=$mass $\times$specific heat
S$=$mc
and specific heat, $C = \dfrac{{\Delta Q}}{{n\Delta T}}$
In general, heat capacity is the body's ability to retain heat.
More the heat capacity of the body, more is the heat energy absorbed by it.
3. Mass of body:- More the mass of the body, means more the heat capacity which means more is the heat energy absorbed by the body as
Heat capacity $\times$ mass of body
So, heat absorbed by a body also depends upon the mass of the body.

Additional Information:
It also depends upon the color of the body as dark color absorbs more heat.

Note:
Heat capacity as name specifies is the capacity of a body to retain heat, not to lose heat.
The body which can withstand high temperature has more heat capacity.
Also more the mass more with the heat capacity.